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When running the power and control wires, the following guidelines should be followed:
  • Install the AC input power wiring in its own rigid steel conduit.
  • Install the output motor leads in their own rigid steel conduit.
  • Install the control wiring in its own rigid steel conduit. Low voltage DC control wiring and 120 Vac control wiring should be run in separate conduits.
  • Make sure that all grounds are tightly connected, and properly earth grounded.
NOTE:
If multiple VFDs are mounted near each other, the input power wiring for each VFD can be run in the one conduit, and the control wiring for each VFD can be run in a second conduit, but each set of motor leads MUST be in a separate conduit. However, if one VFD is used to run multiple motors, the output wiring for all of the motors can be run in the same conduit.